But the Richter scale, denoted by a number called the "magnitude," is the most common. This quantity, which can be read off a seismograph, reflects the amount by which the earth's crust shifts ...An earthquake measuring 6.4 on the Richter scale struck Japan in July 2007, causing extensive damage. Earlier that year, a minor earthquake measuring 3.1 on the Richter scale was felt in parts of Pennsylvania. How many times more intense was the Japanese earthquake than the Pennsylvania earthquake?Seismic intensity scales categorize the intensity or severity of ground shaking (quaking) at a given location, such as resulting from an earthquake.They are distinguished from seismic magnitude scales, which measure the magnitude or overall strength of an earthquake, which may, or perhaps may not, cause perceptible shaking.. Intensity scales are based on the observed effects of the shaking ...The Richter Scale is one method for measuring the intensity of earthquakes. The Richter Magnitude Scale is one method for measuring the intensity of earthquakes. An earthquake's magnitude is the logarithm of the amplitude of waves. The waves are detected by seismographs. Remember, because the Richter Magnitude Scale is logarithmic, each …The Richter Scale was developed by Dr. Charles Richter (with assistance from others) at Cal tech and is a scale that represents the overall magnitude of an earthquake. Although the ground motion from the earthquake has different intensities at different locations (just as in blasting), the total size of the earthquake is determined andThe scale was developed in the 1970s to succeed the 1930s-era Richter magnitude scale (ML). Even though the formulae are different, the new scale retains the familiar continuum of magnitude values defined by the older one. The MMS is now the scale used to estimate magnitudes for all modern large earthquakes by the United States Geological Survey.Oct 3, 2011 ... While the Richter scale is the most easily recognized measure of an earthquake's magnitude, seismologists say several more dynamic ...The Richter scale measures earthquakes ranging from a magnitude of 1 to a magnitude of 10. 10 represents the highest level of earthquake. Register to view this lesson Are you a student or a teacher?Top Magnitude scales can be used to describe earthquakes so small that they are expressed in negative numbers. The scale also has no upper limit. Learn more about how we measure earthquake magnitude.A value of IV indicates a level of shaking that is felt by most people. An abridged version of the scale, based on the table in the back of Bolt's "Earthquakes" book, is located here. Early in the study of earthquakes, intensities were assigned by scientists who traveled to regions that had recently experienced strong earthquakes.An increase of 1 in the Richter magnitude, there is a tenfold increase in the size of the waves also known as shaking amplitude. The Richter scale 5.0 is 10 times more shaking amplitude of 4.0. But there is a huge difference in energy. The energy release of an earthquake denotes the destructive power.The China seismic intensity scale (CSIS) is a national standard in the People's Republic of China used to measure seismic intensity.Similar to EMS-92 on which CSIS drew reference, seismic impacts are classified into 12 degrees of intensity, or liedu (Chinese: 烈度; pinyin: lièdù, literally "degrees of violence") in Roman numerals from I for insensible to XII for landscape reshaping. In 1858, John Mallet formally proposed the first edition of the macroseismic-intensity scale, which divided earthquakes into three categories according to their intensity: great, mean, and minor. ... At the D1 and D2 levels, there are slight differences among the three intensity scales. However, at the D3 and D4 levels, the level of structural ...The Richter scale measures the magnitude of an earthquake (how powerful it is). It is measured using a machine called a seismometer which produces a seismograph. A …Earthquake intensity scales describe the severity of an earthquake’s effects on the Earth's surface, humans, and buildings at …An earthquake produces three kinds of waves that travel through the Earth’s crust. P-waves are primary waves and are the first waves to arrive. They are also called sound or compression waves since they are often heard rather than felt. They travel at 4–8 km/sec (14,000–28,000 km/h) in the Earth’s crust.Groundwater levels in wells can oscillate up and down when seismic waves pass. The water level might remain higher or lower for a period of time after the seismic waves end, but sometimes a long-term offset of groundwater levels follows an earthquake. The largest recorded earthquake-induced offset in a well is a one meter rise. The Richter Scale is a way of measuring the strength of an earthquake. It was created by seismologist Charles Richter in 1935 and is used around the world to understand how strong an earthquake was. The scale goes from 1 to 9 so if an earthquake is rated 5, that means it is 10 times stronger than an earthquake rated 4 and 100 times …Oct 11, 2023 · The Global Seismic Activity Level (GSAL) was developed by geologist and volcanologist Tom Pfeiffer PhD for VolcanoDiscovery, as an online tool to visualize current levels of seismic activity on a global scale. It is based on the averages of all earthquakes during a given time interval. GSAL is a numeric value ranging from 0-10 indicating the ... Nov 4, 2019 · The Modified Mercalli Intensity Scale of 1931 is the basis for the U.S. evaluation of seismic intensity. Intensity is different than the magnitude in that it is based on observations of the effects and damage of an earthquake, not on scientific measurements. This means that an earthquake may have different intensities from place to place, but ... Nov 4, 2019 · The Modified Mercalli Intensity Scale of 1931 is the basis for the U.S. evaluation of seismic intensity. Intensity is different than the magnitude in that it is based on observations of the effects and damage of an earthquake, not on scientific measurements. This means that an earthquake may have different intensities from place to place, but ... Note that the expected damage varies with quality of construction and level of retrofitting. To accurately evaluate how your house will perform in an earthquake ...Nov 10, 2016 · The Richter scale is based on the maximum amplitude of certain seismic waves, and seismologists estimate that each unit of the Richter scale is a 31 times increase of energy. Moment Magnitude Scale is a recent measure that is becoming more frequently used. If the level of acceleration is combined with duration, the power of destruction is defined. But the Richter scale, denoted by a number called the "magnitude," is the most common. This quantity, which can be read off a seismograph, reflects the amount by which the earth's crust shifts ...May 8, 2018 ... The Richter Magnitude Scale is one method for measuring the intensity of earthquakes. An earthquake's ... level 5 compared to a level 6 earthquake ...Another earthquake has been felt in parts of Melbourne after a magnitude 4.6 quake struck near Mt Baw Baw in eastern Victoria about 1.30am. The earthquake – the largest recorded in the state ...The Japan Meteorological Agency (JMA) Seismic Intensity Scale [1] (known in Japan as the Shindo seismic scale) [2] is a seismic intensity scale used in Japan to categorize the …The Richter Scale is a measurement of the magnitude of an earthquake and is used to determine the intensity and destruction of an earthquake. Developed in the 1930s by Dr. Charles Richter, the scale is based on the amplitude of seismic waves, which is the energy released during an earthquake. The Richter Scale is divided into levels, each level …A value of IV indicates a level of shaking that is felt by most people. An abridged version of the scale, based on the table in the back of Bolt's "Earthquakes" book, is located here. Early in the study of earthquakes, intensities were assigned by scientists who traveled to regions that had recently experienced strong earthquakes.The alert level determines which users are actively notified, and, at the same time, all PAGER content is automatically distributed to the web on the USGS Earthquake Hazards Program Web pages, as part of the earthquake summary information, for immediate consumption. The PAGER Earthquake Impact ScaleOct 20, 2023 · The Japan Meteorological Agency has a unique seismic scale called shindo that measures the degree of shaking in the event of an earthquake. This set of numbers — ranging from 0 to 7 — is ... Intensity scales, like the Modified Mercalli Scale and the Rossi-Forel scale, measure the amount of shaking at a particular location. An earthquake causes many different intensities of shaking in the area of the epicenter where it occurs. So the intensity of an earthquake will vary depending on where you are.Earthquake Magnitude Scales The severity of an earthquake is generally proportional to the amount of seismic energy it releases. Seismologists use a Magnitude scale to express this energy release. Here are the typical effects of earthquakes in various magnitude ranges.The China seismic intensity scale (CSIS) is a national standard in the People's Republic of China used to measure seismic intensity.Similar to EMS-92 on which CSIS drew reference, seismic impacts are classified into 12 degrees of intensity, or liedu (Chinese: 烈度; pinyin: lièdù, literally "degrees of violence") in Roman numerals from I for insensible to XII for landscape reshaping.Feb 8, 2023 · In the city of Nurdağı, close to the epicentre of the 7.8 magnitude earthquake, the roofs of many buildings have entirely fallen in. Other structures have crumbled all together. The Richter scale [1] ( / ˈrɪktər / ), also called the Richter magnitude scale, Richter's magnitude scale, and the Gutenberg–Richter scale, [2] is a measure of the strength of earthquakes, developed by Charles Francis Richter and presented in his landmark 1935 paper, where he called it the "magnitude scale". [3]11.3 Measuring Earthquakes There are two main ways to measure earthquakes. The first of these is an estimate of the energy released, ... and this ratio applies to all intervals in the scale. If we assign an arbitrary energy level of 1 unit to a M1 earthquake the energy for quakes up to M8 will be as shown on the following chart: Magnitude Energy; 1: 1: 2: 32: …To monitor earthquakes, JMA operates an earthquake observation network comprised of about 200 seismographs and 600 seismic intensity meters. It also collects data from over 3,600 seismic intensity meters managed by local governments and the National Research Institute for Earth Science and Disaster Prevention (NIED).Top Magnitude scales can be used to describe earthquakes so small that they are expressed in negative numbers. The scale also has no upper limit. Learn more about how we measure earthquake magnitude.The magnitude-9.0 earthquake struck at 2:46 pm. (The early estimate of magnitude 8.9 was later revised upward.) The epicentre was located some 80 miles (130 km) east of the city of Sendai, Miyagi prefecture, and the focus occurred at a depth of 18.6 miles (about 30 km) below the floor of the western Pacific Ocean.The earthquake was …An earthquake scale for measuring magnitude has no lower or upper bounds. Sensitive seismographs can even record earthquake magnitudes of negative values and have …You can measure an earthquake either by its size where the rock slipped, or by the amount of shaking that is experienced at a place that interests you. Both measures are used. The measure of the size of the earthquake where it occurred is the “magnitude.”. Each earthquake has a single value on a magnitude scale – the strength right in the ... SDC/Map Color. C/Yellow. Earthquake Hazard. Could experience strong shaking. Potential Effects of Shaking. Strong shaking—Damage negligible in buildings of good design and construction; slight to moderate in well-built ordinary structures; considerable damage in poorly built structures. SDC/Map Color. D/Light Brown.HAMOON Max Wind Speeds. Sunday, 10/22 - Wednesday, 10/25. 17 34 51 68 85. mph. 10/22 10/25 11 PM 11 AM. Sustained Winds.The epicenter is the point at ground level directly above the hypocenter. Major examples. Earthquakes (M6.0+) since 1900 through 2017 Earthquakes of magnitude 8.0 and greater from 1900 to 2018. The apparent 3D volumes of the bubbles are linearly proportional to their respective fatalities. ... The first scale for measuring earthquake magnitudes was …The Richter magnitude scale was created to rate the strength and magnitude of earthquakes. It is a base-10 logarithm scale of ground motion 100km from the epicenter. Each increase of 1 magnitude means 10 times greater ground motion. To measure the amount of energy that was released during an Earthquake, a base 32 logarithm scale is …6.1 - 6.9. Can cause damage to poorly constructed buildings and other structures in areas up to about 100 kilometers across where people live. 7.0 - 7.9. "Major" earthquake. Can cause serious damage over larger areas. 8.0 - 8.9. "Great" earthquake. Can cause serious damage and loss of life in areas several hundred kilometers across. An earthquake's magnitude, as measured by the Richter scale, tells you how much energy the quake released at its epicenter. The magnitude is the same no matter ...The earthquake, which hit at 4:17 a.m., according to the United States Geological Survey, measured at magnitude 7.8. ... The strength of earthquakes is measured on a scale known as the local ...Groundwater levels in wells can oscillate up and down when seismic waves pass. The water level might remain higher or lower for a period of time after the seismic waves end, but sometimes a long-term offset of groundwater levels follows an earthquake. The largest recorded earthquake-induced offset in a well is a one meter rise. In the Building Earthquake Code [4] [5] [6][7] published in Turkey, the acceleration spectra required for the earthquake design of the structures, the desired earthquake level (ground motion) and ...Around 68% of displaced households are living in areas adjacent to their damaged homes, and access to education and healthcare is severely limited. On April 25, Nepal was devastated by a massive earthquake measuring 7.8 on the richter scale...Charles F. Richter devised his magnitude scale in the mid-1930s while investigating earthquakes in California. He used seismographs which magnified ground motion 2800 times, and as a baseline, he defined a magnitude 0 earthquake as being one that would produce a record with an amplitude of one-thousandth of a millimeter at a distance of 100 ...Note that the expected damage varies with quality of construction and level of retrofitting. To accurately evaluate how your house will perform in an earthquake ...No, earthquakes of magnitude 10 or larger cannot happen. The magnitude of an earthquake is related to the length of the fault on which it occurs. That is, the longer the fault, the larger the earthquake. A fault is a break in the rocks that make up the Earth's crust, along which rocks on either side have moved past each other. No fault long …The Richter scale is a base-10 logarithmic scale, meaning that each order of magnitude is 10 times more intensive than the last one. In other words, a two is 10 times more intense than a one and a three is 100 times greater. In the case of the Richter scale, the increase is in wave amplitude. That is, the wave amplitude in a level 6 earthquake ...Earthquake magnitude is measured by the Moment Magnitude Scale, an updated version of the Richter scale. It measures the energy released during an earthquake. This is related to the amount of slip (movement) on the fault lane and the area of movement on the fault plane. MMS uses a logarithmic scale, meaning that a magnitude 6 earthquake has ten ...The Richter Scale was developed by Dr. Charles Richter (with assistance from others) at Cal tech and is a scale that represents the overall magnitude of an earthquake. Although the ground motion from the earthquake has different intensities at different locations (just as in blasting), the total size of the earthquake is determined andThe level of danger is based on the PGA value and the earthquake intensity value in the Modified Mercalli Intensity (MMI) scale. In this research, the geomorphological approach and microtremor analysis are carried out to quantify site specifics which are expressed in Vs30 values.Notes. As a rule, seismic intensities announced by JMA are values observed using seismic intensity meters installed on the ground or on the first floor of low-rise buildings. This document describes the phenomena and damage that may be observed for individual seismic intensity levels. Seismic intensities are not determined from the observed ...The Richter scale measures earthquakes ranging from a magnitude of 1 to a magnitude of 10. 10 represents the highest level of earthquake. Register to view this lesson Are you a student or a teacher?The earthquake is felt indoors by many people, outdoors by very few. A few people are awakened. The level of vibration is not frightening. Windows, doors and dishes rattle. Hanging objects swing. 5: Strong: The earthquake is felt indoors by most, outdoors by few. Many sleeping people awake. A few run outdoors. Buildings tremble throughout.The Richter Scale is a quantitative measure of the Earthquake magnitude. It is also called the magnitude scale, where the energy released is measured in the range of 1-10. Richter scale is one of the most important topics for the UPSC IAS exam. It covers a significant part of Geography in the General Studies Paper-1 syllabus and Science and ...Feb 27, 2023 ... The magnitude of an earthquake is a measure of its size or strength that is used to represent the amount of energy generated by the earthquake.Types of Magnitudes Magnitude is expressed in whole numbers and decimal fractions. For example, a magnitude 5.3 is a moderate earthquake, and a 6.3 is a strong earthquake. Because of the logarithmic basis of the scale, each whole number increase in magnitude represents a tenfold increase in measured amplitude as measured on a seismogram.Events are rated at seven levels. The scale is logarithmic – that is, the severity of an event is about ten times greater for each increase in level of the scale. Events are considered in terms of: Impact on people and the environment; Impact on radiological barriers and control; Impact on defence in depth; Events without safety significance are rated as Below …The building is subjected to three earthquakes levels. Based on the building responses and computed peak story horizontal accelerations, maximum inter-story drifts, and settlements, conclusions are drawn about the influence of soil-structure interaction in the response of tall buildings. Get full access to this article. View all available purchase …Tell the students that they will be comparing Richter Scale levels by relating them to time. More specifically, a level one earthquake will be 1 second. Since a level two earthquake is 10 times "bigger" than a level 1 earthquake, it will also be 10 times bigger in terms of seconds (1x10 seconds) or 10 seconds.Description of the activity/assignment. This is a introductory lab exercise that is intended to convey the concept of the logarithmic scale used for earthquake magnitude. The students will visualize magnitude as a distance over the ground, by using a contrived conversion between magnitude and distance. Using distances helps the students ...The Richter Magnitude Scale Seismic waves are the vibrations from earthquakes that travel through the Earth; they are recorded on instruments called seismographs. Seismographs record a zig-zag …It is logarithmic which means, for example, that an earthquake measuring magnitude 5 is ten times more powerful than an earthquake measuring 4. Earthquakes measuring 1-2 on the scale happen ...Oct 11, 2023 · The Global Seismic Activity Level (GSAL) was developed by geologist and volcanologist Tom Pfeiffer PhD for VolcanoDiscovery, as an online tool to visualize current levels of seismic activity on a global scale. It is based on the averages of all earthquakes during a given time interval. GSAL is a numeric value ranging from 0-10 indicating the ... Mon 6 Feb 2023 11.07 EST. First published on Sun 5 Feb 2023 21.35 EST. More than 2,000 people were killed when an earthquake struck central Turkey and north-west Syria, in one of the most powerful ...An increase of 1 in the Richter magnitude, there is a tenfold increase in the size of the waves also known as shaking amplitude. The Richter scale 5.0 is 10 times more shaking amplitude of 4.0. But there is a huge difference in energy. The energy release of an earthquake denotes the destructive power.The Global Seismic Activity Level (GSAL) was developed by geologist and volcanologist Tom Pfeiffer PhD for VolcanoDiscovery, as an online tool to visualize current levels of seismic activity on a global scale. It is based on the averages of all earthquakes during a given time interval. GSAL is a numeric value ranging from 0-10 indicating the ...But the Richter scale, denoted by a number called the "magnitude," is the most common. This quantity, which can be read off a seismograph, reflects the amount by which the earth's crust shifts ...It is logarithmic which means, for example, that an earthquake measuring magnitude 5 is ten times more powerful than an earthquake measuring 4. Earthquakes measuring 1-2 on the scale happen ...Charles F. Richter devised his magnitude scale in the mid-1930s while investigating earthquakes in California. He used seismographs which magnified ground motion 2800 times, and as a baseline, he defined a magnitude 0 earthquake as being one that would produce a record with an amplitude of one-thousandth of a millimeter at a distance of 100 ... May 8, 2018 · The Richter Scale is one method for measuring the intensity of earthquakes. The Richter Magnitude Scale is one method for measuring the intensity of earthquakes. An earthquake's magnitude is the logarithm of the amplitude of waves. The waves are detected by seismographs. Remember, because the Richter Magnitude Scale is logarithmic, each whole number increase in earthquake level means a tenfold ... Jan 27, 2023 · 15. Atacama, Chile; 1922; magnitude 8.5. A black and white photograph showing the damage caused by the Vallenar earthquake in 1922. (Image credit: By Gustavo Bruzzone Rocco - Unknown source ... Oct 3, 2011 ... While the Richter scale is the most easily recognized measure of an earthquake's magnitude, seismologists say several more dynamic ...The Mercalli intensity scale (or more precisely the Modified Mercalli intensity scale) is a scale to measure the intensity of earthquakes. Unlike with the Richter scale, the Mercalli scale does not take into account energy of an earthquake directly. Rather, they classify earthquakes by the effects they have (and the destruction they cause).In 1935 the American seismologist Charles F. Richter set up a magnitude scale of earthquakes as the logarithm to base 10 of the maximum seismic wave amplitude (in thousandths of a millimetre) recordedMagnitudes are based on a logarithmic scale (base 10). What this means is that for each whole number you go up on the magnitude scale, the amplitude of the ground motion recorded by a seismograph goes up ten times. Using this scale, a magnitude 5 earthquake would result in ten times the level of ground shaking as a magnitude 4 earthquake (and ...Great earthquakes, such as the 1964 Good Friday earthquake in Alaska, have magnitudes of 8.0 or higher. On the average, one earthquake of such size occurs somewhere in the world each year. Although the Richter Scale has no upper limit, the largest known shocks have had magnitudes in the 8.8 to 8.9 range.1 Jan. 2010 Available for SOS Explorer Categories Land: Plate Tectonics Keywords Earthquakes Geology Land Real-time Richter Scale Seismic Waves Seismology …Natural forces. Earthquakes are caused by the sudden release of energy within some limited region of the rocks of the Earth.The energy can be released by elastic strain, gravity, chemical reactions, or even the motion of massive bodies.Of all these the release of elastic strain is the most important cause, because this form of energy is the …
The Richter Scale was developed by Dr. Charles Richter (with assistance from others) at Cal tech and is a scale that represents the overall magnitude of an earthquake. Although the ground motion from the earthquake has different intensities at different locations (just as in blasting), the total size of the earthquake is determined and. Mi landwatch
The intensity of an earthquake refers to the level of ground-shaking at a given location Earthquake intensity decreases with increasing distance away from an earthquake The Modified Mercalli Intensity (MMI) scale is commonly used to describe the damage and felt effects of an earthquake at a given locationThe Richter Scale is a logarithmic scale for measuring earthquakes, meaning a 5 is ten times more powerful than a 4. The Richter scale is a logarithmic scale that measures the magnitude of an earthquake, originally developed by Charles F. Richter in 1935. It provides an objective measure of the energy an earthquake releases by …The Richter scale is logarithmic, meaning that whole-number jumps indicate a tenfold increase. In this case, the increase is in wave amplitude. That is, the wave amplitude in a level 6 earthquake is 10 times greater than in a level 5 earthquake, and the amplitude increases 100 times between a level 7 earthquake and a level 9 earthquake. Thus, if we consider a small earthquake at the felt level, about magnitude 2, there would have to be 40x40x40x40x40x40x40 of these earthquakes to release the amount of energy as one magnitude 9 event. That is about one million small earthquakes a day, every day, for 500 years. That level of earthquake activity is not observed. ... The vertical scale …Earthquake size, as measured by the Richter Scale is a well known, but not well understood, concept. The idea of a logarithmic earthquake magnitude scale was first developed by Charles Richter in the 1930's for measuring the size of earthquakes occurring in southern California using relatively high-frequency data from nearby seismograph …Sep 22, 2017 · Scientists no longer rely on the the Richter scale to measure an earthquake's power. Here's how earthquakes are measured, and why a 7.1 quake is worse than you might imagine. The Modified Mercalli intensity scale (MM, MMI, or MCS) measures the effects of an earthquake at a given location. This is in contrast with the seismic magnitude usually …The building is subjected to three earthquakes levels. Based on the building responses and computed peak story horizontal accelerations, maximum inter-story drifts, and settlements, conclusions are drawn about the influence of soil-structure interaction in the response of tall buildings. Get full access to this article. View all available purchase …Magnitudes are based on a logarithmic scale (base 10). What this means is that for each whole number you go up on the magnitude scale, the amplitude of the ground motion recorded by a seismograph goes up ten times. Using this scale, a magnitude 5 earthquake would result in ten times the level of ground shaking as a magnitude 4 earthquake (and ...Earthquake Magnitude Scale. Magnitude scales can be used to describe earthquakes so small ...Jun 28, 2019 ... Does anyone know if 3 level 5 EQ spells will destroy walls now? I know each does 29% damage, but I also know damage scales with each successive ...A value of IV indicates a level of shaking that is felt by most people. An abridged version of the scale, based on the table in the back of Bolt's "Earthquakes" book, is located here. Early in the study of earthquakes, intensities were assigned by scientists who traveled to regions that had recently experienced strong earthquakes. The abundance of landslide dams associated with the Wenchuan earthquake is unprecedented in historic reports, and allowed a number of novel quantitative insights regarding the short-term impact on postseismic water and sediment fluxes in the Longmen Shan mountain range (Fan et al., 2012).Most importantly, the synchronous formation of …This scale, composed of 12 increasing levels of intensity that range from imperceptible shaking to catastrophic destruction, is designated by Roman numerals. It ...Jul 1, 2021 · Earthquake Intensity - Modified Mercalli Intensity (MMI) Scale. The Modified Mercalli Intensity value assigned to a specific site after an earthquake has a more meaningful measure of severity to the nonscientist than the magnitude because intensity refers to the effects actually experienced at that place. The lower numbers of the intensity ... The strength of the earthquake on the Richter scale. Level of development - whether it occurs in a rich advanced country (AC) or a low-income developing country (LIDC). Richer countries will be ...The epicenter is the point at ground level directly above the hypocenter. Major examples. Earthquakes (M6.0+) since 1900 through 2017 Earthquakes of magnitude 8.0 and greater from 1900 to 2018. The apparent 3D volumes of the bubbles are linearly proportional to their respective fatalities. ... The first scale for measuring earthquake magnitudes was …The Mercalli scale measures the effects of the earthquake and runs from 1 to 12. The higher up the scale the more damage is experienced by people and building structures. The first 6 levels on the scale reflect mainly the impacts on people, whilst the top 6 levels reflect impacts on buildings and infrastructure. The Richter scale is different in that it measures …A representation of the INES levels. The International Nuclear and Radiological Event Scale (INES) was introduced in 1990 by the International Atomic Energy Agency (IAEA) in order to enable prompt communication of safety significant information in case of nuclear accidents.. The scale is intended to be logarithmic, similar to the moment magnitude scale that is …Earthquake Magnitude Scales Less than 3.5 Recorded on local seismographs, but generally not felt.. 3.5 - 5.4 Often felt, but rarely cause damage.. Under 6.0 At most slight damage ….